Much of what we know about plant circadian rhythms is the result of laboratory experiments where inputs such as light and temperature can be tightly controlled. Less is known about how these ...

Light usually passes through each other. For example, if two flashlights cross each other in a classroom, light has no mass, so each light continues moving forward without being affected by the other.

There's nothing quite like going for a walk on a bright, spring day. But basking in the sunshine could soon be a thing of the past. That's because it has emerged that experts are planning on dimming ...